Th\u1eadm tr\u00ed c\u00f2n l\u00e0 nh\u00e0 tranh. N\u1ebfu b\u1ecb b\u1eaft l\u1eeda th\u00ec s\u1ebd lan sang c\u1ea3 h\u00e0ng x\u00f3m. B\u1eddi v\u1eady, \u0111\u1ec3 an to\u00e0n, ng\u01b0\u1eddi ta \u0111\u00e3 x\u00e2y nh\u1eefng b\u1ee9c t\u01b0\u1eddng cao bao quanh khu\u00f4n vi\u00ean nh\u00e0, nh\u1eb1m ch\u1eb7n \u0111\u1ee9ng ng\u1ecdn l\u1eeda lan sang, b\u1ea3o v\u1ec7 s\u1ef1 an to\u00e0n cho b\u1ea3n th\u00e2n. B\u1ee9c t\u01b0\u1eddng n\u00e0y g\u1ecdi l\u00e0 t\u01b0\u1eddng ng\u0103n l\u1eeda. N\u00f3i r\u1ed9ng ra, t\u01b0\u1eddng th\u00e0nh c\u1ed5 c\u0169ng l\u00e0 m\u1ed9t lo\u1ea1i t\u01b0\u1eddng ng\u0103n l\u1eeda ch\u1ed1ng gi\u1eb7c c\u01b0\u1edbp x\u00e2m nh\u1eadp, v\u00e0 n\u00f3 v\u00f4 c\u00f9ng quan tr\u1ecdng cho vi\u1ec7c \u0111\u1ea3m b\u1ea3o s\u1ef1 an to\u00e0n. Trong Tam qu\u1ed1c di\u1ec5n ngh\u0129a, 80 v\u1ea1n \u0111\u1ea1i qu\u00e2n T\u00e0o Th\u00e1o tr\u00fang ph\u1ea3i k\u1ebf li\u00ean ho\u00e0n c\u1ee7a B\u00e0ng Th\u1ed1ng t\u1ea1i X\u00edch B\u00edch, \u0111\u00e3 li\u00ean k\u1ebft c\u00e1c chi\u1ebfn thuy\u1ec1n l\u1ea1i m\u00e0 l\u1ea1i kh\u00f4ng thi\u1ebft l\u1eadp b\u1ee9c t\u01b0\u1eddng ng\u0103n l\u1eeda. V\u1eady Chu Du ch\u1ec9 m\u1ed9t b\u00f3 \u0111u\u1ed1c thi\u00eau r\u1ee5i doanh tr\u1ea1i qu\u00e2n T\u00e0o, th\u00e2y ch\u1ebft ng\u1ed5n ngang. Ng\u00e0y nay, h\u1ec7 th\u1ed1ng m\u1ea1ng kh\u00f4ng ch\u1ec9 k\u1ebft n\u1ed1i c\u00e1c m\u00e1y t\u00ednh trong n\u1ed9i b\u1ed9 h\u1ec7 th\u1ed1ng, c\u00f2n li\u00ean k\u1ebft c\u00e1c m\u1ea1ng. \u0110\u1eb7c bi\u1ec7t l\u00e0 m\u1ea1ng Internet, n\u00f3 \u0111\u00e3 k\u1ebft n\u1ed1i ch\u1eb7t ch\u1ebd c\u00e1c h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh c\u00e1c v\u00f9ng tr\u00ean th\u1ebf gi\u1edbi. B\u1edfi v\u1eady, n\u1ebfu kh\u00f4ng t\u0103ng c\u01b0\u1eddng ph\u00f2ng v\u1ec7, m\u1ed9t khi m\u1ea1ng b\u1ecb k\u1ebb \u0111\u1ecbch ho\u1eb7c b\u1ecdn hacker t\u1ea5n c\u00f4ng th\u00ec h\u1eadu qu\u1ea3 kh\u00f4ng th\u1ec3 l\u01b0\u1eddng n\u1ed5i.<\/p>\n\n\n\n
Tr\u00ean m\u1ea1ng li\u00ean k\u1ebft, ng\u01b0\u1eddi ta \u0111\u00e3 \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p t\u1ef1a nh\u01b0 b\u1ee9c t\u01b0\u1eddng ng\u0103n l\u1eeda, b\u1ea3o v\u1ec7 t\u00e0i nguy\u00ean m\u1ea1ng kh\u1ecfi b\u1ecb x\u00e2m h\u1ea1i. Nh\u1eefng thi\u1ebft b\u1ecb c\u00f3 ch\u1ee9c n\u0103ng nh\u01b0 v\u1eady \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u01b0\u1eddng (ng\u0103n) l\u1eeda (fire wall). T\u01b0\u1eddng l\u1eeda l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng c\u00e1ch li trung gian, c\u00e0i gi\u1eefa m\u1ea1ng li\u00ean k\u1ebft v\u00e0 m\u1ea1ng n\u1ed9i b\u1ed9, tr\u1edf th\u00e0nh c\u1eeda \u1ea3i ch\u1eb7n gi\u1eefa ch\u00fang. N\u00f3 c\u00f3 ch\u1ee9c n\u0103ng th\u1ea9m k\u1ebf (ki\u1ec3m tra, ki\u1ec3m to\u00e1n) v\u00e0 t\u0103ng c\u01b0\u1eddng an to\u00e0n.<\/p>\n\n\n\n
M\u1ee5c \u0111\u00edch c\u1ee7a vi\u1ec7c thi\u1ebft l\u1eadp t\u01b0\u1eddng l\u1eeda l\u00e0 \u0111\u1ec3 b\u1ea3o v\u1ec7 m\u1ea1ng c\u1ee7a m\u00ecnh kh\u1ecfi b\u1ecb t\u1ea5n c\u00f4ng t\u1eeb b\u00ean ngo\u00e0i. B\u1edfi v\u1eady, c\u1ea7n x\u00e1c \u0111\u1ecbnh nh\u1eefng tin lo\u1ea1i n\u00e0o th\u00ec \u0111\u01b0\u1ee3c truy\u1ec1n qua b\u1ee9c t\u01b0\u1eddng n\u00e0y, v\u00e0 lo\u1ea1i n\u00e0o th\u00ec kh\u00f4ng cho ph\u00e9p. \u0110\u00f3 ch\u00ednh l\u00e0 “v\u1ea5n \u0111\u1ec1 s\u00e1ch l\u01b0\u1ee3c an to\u00e0n c\u1ee7a t\u01b0\u1eddng l\u1eeda”.<\/p>\n\n\n\n
Hi\u1ec7n nay ch\u1ee7 y\u1ebfu c\u00f3 hai lo\u1ea1i s\u00e1ch l\u01b0\u1ee3c an to\u00e0n kh\u00e1c h\u1eb3n nhau: m\u1ed9t lo\u1ea1i t\u1eeb ch\u1ed1i t\u1ea5t c\u1ea3 m\u1ecdi th\u1ee9 ch\u01b0a \u0111\u01b0\u1ee3c ph\u00e9p \u0111i v\u00e0o m\u1ea1ng. M\u1ed9t lo\u1ea1i kh\u00e1c l\u00e0 cho ph\u00e9p t\u1ea5t c\u1ea3 nh\u1eefng th\u1ee9 ch\u01b0a b\u1ecb t\u1eeb ch\u1ed1i \u0111\u01b0\u1ee3c v\u00e0o. X\u00e9t theo g\u00f3c \u0111\u1ed9 t\u00ednh an to\u00e0n c\u1ee7a m\u1ea1ng th\u00ec c\u00e1i \u0111\u1ea7u l\u00e0 ch\u1eb7t ch\u1ebd. \u00fd ngh\u0129a c\u1ee7a n\u00f3 l\u00e0: Ngo\u00e0i nh\u1eefng th\u00f4ng tin \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn l\u00e0 \u0111\u00e1ng tin c\u1eady ra th\u00ec nh\u1eefng th\u00f4ng tin kh\u00e1c \u0111\u1ec1u kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p v\u00e0o.<\/p>\n\n\n\n
Nh\u01b0ng nh\u01b0 v\u1eady c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng t\u1edbi t\u00ednh li\u00ean k\u1ebft l\u1eabn nhau. C\u00e1i sau l\u1ecfng h\u01a1n. \u00fd ngh\u0129a c\u1ee7a n\u00f3 l\u00e0: Ngo\u1ea1i tr\u1eeb nh\u1eefng tin \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn l\u00e0 kh\u00f4ng th\u1ec3 tin c\u1eady ra th\u00ec \u0111\u1ec1u c\u00f3 th\u1ec3 v\u00e0o m\u1ea1ng n\u1ed9i b\u1ed9. \u0110i\u1ec1u n\u00e0y c\u00f3 l\u1ee3i cho vi\u1ec7c trao \u0111\u1ed5i th\u00f4ng tin, nh\u01b0ng l\u1ea1i ti\u1ec1m \u1ea9n tai h\u1ecda trong \u0111\u00f3.<\/p>\n\n\n\n
\u00c1p d\u1ee5ng lo\u1ea1i t\u01b0\u1eddng l\u1eeda theo s\u00e1ch l\u01b0\u1ee3c an to\u00e0n n\u00e0o l\u00e0 quy\u1ebft \u0111\u1ecbnh b\u1edfi ho\u00e0n c\u1ea3nh v\u00e0 \u0111i\u1ec1u ki\u1ec7n t\u1ef1 th\u00e2n c\u1ee7a m\u1ea1ng. C\u1ea7n ph\u1ea3i x\u00e1c \u0111\u1ecbnh s\u00e1ch l\u01b0\u1ee3c an to\u00e0n v\u00e0 \u00e1p d\u1ee5ng t\u01b0\u1eddng ph\u00f2ng v\u1ec7 t\u01b0\u01a1ng \u1ee9ng tr\u00ean c\u01a1 s\u1edf ph\u00e2n t\u00edch an to\u00e0n \u0111\u1ed1i v\u1edbi m\u1ea1ng c\u1ee7a m\u00ecnh, ph\u00e2n t\u00edch nhu c\u1ea7u th\u01b0\u01a1ng m\u1ea1i v\u00e0 t\u00ednh to\u00e1n m\u1ee9c \u0111\u1ed9 r\u1ee7i ro.<\/p>\n\n\n\n
T\u1eeb kh\u00f3a: T\u01b0\u1eddng (ng\u0103n) l\u1eeda; M\u1ea1ng li\u00ean k\u1ebft.<\/p>\n","protected":false},"excerpt":{"rendered":"
Th\u1eadm tr\u00ed c\u00f2n l\u00e0 nh\u00e0 tranh. N\u1ebfu b\u1ecb b\u1eaft l\u1eeda th\u00ec s\u1ebd lan sang c\u1ea3 h\u00e0ng x\u00f3m. B\u1eddi v\u1eady, \u0111\u1ec3 an to\u00e0n, ng\u01b0\u1eddi ta \u0111\u00e3 x\u00e2y nh\u1eefng b\u1ee9c t\u01b0\u1eddng cao bao quanh khu\u00f4n vi\u00ean nh\u00e0, nh\u1eb1m ch\u1eb7n \u0111\u1ee9ng ng\u1ecdn l\u1eeda lan sang, b\u1ea3o v\u1ec7 s\u1ef1 an to\u00e0n cho b\u1ea3n th\u00e2n. B\u1ee9c t\u01b0\u1eddng n\u00e0y g\u1ecdi l\u00e0 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,13],"tags":[],"class_list":["post-10350","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-tin-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10350","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=10350"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10350\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=10350"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=10350"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=10350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}